What is the area of the shaded region?

The circumference of a circle is 5 pi cm. what is the area of the circle?

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much